Apparatus for die casting an internal passageway and a product manufactured therewith

• US 6,588,489 B1
• Filed: 03/26/1999
• Issued: 07/08/2003
• Est. Priority Date: 03/27/1998
• Status: Expired due to Fees

• Current Assignee: Tesma International, Inc. (Magna International Incorporated)
• Original Assignee: Tesma International, Inc. (Magna International Incorporated)
• Inventors: Spiller, George, Vert, Peter J.
• Primary Examiner(s): Dunn, Tom
• Assistant Examiner(s): LIN, ING HOUR
• Application Number:
  US09/277,182
• Time in Patent Office: 1,565 Days
• Field of Search: 164/340, 164/137, 164/342, 164/341, 123/195.C
• US Class Current: 164/340
• CPC Class Codes: B22C 9/101 Permanent cores
• CPC Class Codes: B22D 17/22 Dies manufacture, see the appropriate class, e.g. B23P15/24; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
• CPC Class Codes: B22D 17/24 Accessories for locating and holding cores or inserts
• CPC Class Codes: B29C 45/44 for undercut articles
• CPC Class Codes: F01M 11/0004 Oilsumps
• CPC Class Codes: F01M 2011/0066 with passages in the wall, e.g. for axles or fluid passages
• CPC Class Codes: F02F 2200/06 Casting

Abstract

A die casting apparatus comprises a pair of mold assemblies which include molding surfaces cooperating to define a first mold cavity therebetween for casting a first portion of a cast object in the first mold cavity. One of the mold assemblies comprises a fixed mold core, and a movable mold core movable with respect to the fixed mold core along a core axis between a closed position and an open position. The mold cores include casting surfaces disposed such that in the closed position the casting surfaces cooperate to define a second mold cavity therebetween extending transversely to the core axis and in communication with the first mold cavity for casting a remaining portion of the object integral with the first portion, while in the released position the object is substantially released from the one mold assembly.

Claims

1. A vessel cast according to the steps of:

providing a pair of mold assemblies, the mold assemblies including respective molding surfaces cooperating to define a first mold cavity therebetween, the first mold cavity including abase portion for casting a base of the vessel;

therein and a side portion for casting a side of the vessel therein integrally with the base and extending continuously around the base, the base and the side comprising a unitary vessel body,

one of the mold assemblies comprising a first mold core and a second mold core, the mold cores each including a respective casting surface configured for defining a second mold cavity therebetween, the second mold cavity being configured for casting a member including a pair of opposite ends, the second mold cavity being in communication with the first mold cavity for casing the member integral with the vessel body at the opposite ends, the second mold cavity being oriented for disposing the member within an interior of the vessel body and being spaced apart from the base portion for casting the member distally from the base between the opposite ends;

closing the first and second mold cavities;

closing the first and second mold cavities;

injecting a molten material into the mold cavities and allowing the molten material to solidify to thereby cast the unitary vessel body and to cast the member integrally with the vessel body; and

removing the cast vessel from the mold cavities.

2. The vessel according to claim 1, wherein the mold assemblies are movable with respect to each other along a mold axis, the mold cores are movable with respect to each other along a core axis parallel to the mold axis, and the closing step comprises moving one of the mold assemblies along the mold axis towards the other of the mold assemblies and moving one of the mold cores along the core axis towards the other of the mold cores.

3. The vessel according to claim 2, wherein the remaining portion comprises a tubular member, and the casting step comprises inserting a movable core within the second mold cavity, and casting the tubular member between the casting surfaces and the movable core.

4. The vessel according to claim 3, wherein the removing step comprises separating the mold assemblies from one another, displacing the casting surface of the one mold core a distance along the core axis from the casting surface of the other mold core, and moving the cast vessel transversely with respect to the core axis.

5. A cast vessel comprising:

a base and a side integrally cast with the base and extending continuously around the base, the base and the side comprising a unitary vessel body defining a vessel interior therein; and

a tubular member extending through the vessel interior, and including a pair of opposite ends and an outer member surface disposed between the opposite ends, the outer member surface comprising an arcuate surface portion and an apex portion extending from the arcuate surface portion, the member being integrally cast with the vessel body and presenting a through-opening at the opposite ends, and being spaced apart from the base between the opposite ends.

6. The cast vessel according to claim 5, where the apex portion comprises a first planar surface portion and a second planar surface portion, the planar surface portions extending from the arcuate surface portion and terminating at a common apex.

7. The cast vessel according to claim 6, wherein the side comprises at least two side members extending from the base, and the member extends between the two side members.

8. The cast vessel according to claim 7, wherein the tubular member is oriented parallel to the base.